Apparatus for producing dental anesthesia



c. H.DANNEQUIN 1,874,911

APPARATUS FOR Paonucm DENTAL Ammm Filed Feb; 25, 1931 Fig.2

Patented Aug. 30, 1932 =1 wen n pecme DiiN'IAIJ mm Q;

g e e Application lledl'ebruary saver-,smd Ira 510304 11 1n l'ranoeilaroh 1 "1am. A

gddy invention relates apparatus used for pr u cing dentalanzesthesia by progressive, K a 4 As the accessories B, C, D, ma be fixed in i refri eratedy1carbonic:acid-, or;byfmeansi refrigeration either through emissionof air.

8 of et yl chloride in the form of ajet.

' A paratusof thisikind, which have been use u to now in surgical dentistry are often diflicu t to manipulate. 'Besides, in order that such a paratus may have'asatisfactory 1 analgesic e ect and 'inorder that all riskofv mortlfication of: the pul may be avoided, it

is necessary thatxthe re rigerationzshould be i absolutely progressive.

- The apparatusiaccordingto invention a fulfills this condition t I Theappended drawing showsfitheiconstruction'of the apparatus, considered inthe ease -when ethylcnloride is being used as refrigeratin agent,:for m 1s The 'ap-r paratuscou dbe used justas well for anwsthetizin liquids. stead ofldelivering therefri ratmg agent in the form of a et of liqui it ensures its revious gasification and difiuslon in 'a draug thof airdirected onto the tooth bein treated; Moreover, it is easy to ma- -nip ate and takesu little room; a ment of my invention x A preferred embo given byway of example, is illustrated in the ap n'ded drawing in which:

4 and 5" are two cross sections on the n lines A-A and BB of Figs.2 and1,3 respectivelyw Adverting to vice comprises thedifiusini instrument A, a bottle B containing the e ylchloride and,

pressure,

torD. K v

The draught of air provided by the turhim is brou ht to the diii'usingv instrument through a exible rubber tube 1, around by means of other: volatile:

ig. 1 shows the whole of the apparatus; Fi 255 an axial section of the instrument feeding circuit 17 of motor C; The result is Fig.1 it is that the :de-

for theproducing of the stream of air at low; a small turbine C," driven by a mo- ,which'is wound afinemetallictube 2, which;

connects, the'bottleBto said instrument. 1

end;4 o it which, pass the tubes 1 v d 2 -1 These,.a fter traversing a solid piece. 5, open, a

into aifirst difiusionchamber fi, above which is provided a second rather long tubular chamber 7 ,the part 6+7 being screwed onto the ipiece 5inorder' to allow-,of theinstruw e5 ment being easily taken to, pieces. n

o The end part of'tube'2, through 13 passes the e yl chloride, merely-, consists on small canal Smadein thepieceb, ,andlprov longedbya, capillary; conduit 9,. of a small in nozzle 10., 'Said nozzle when the instrument a is not in use, is closedi- -by a smallfmetallic I stopper .11,"supportedby a rotary. rodj 12,1 1 a controlled by asmall lever 13 which theoperator pushes in'an oblique slot 14. I A spring 15. a 15 pushes the'rod and the obturat'ing stop er,

towards the bottom of the instrument. e direction of the displacement to be given; to the lever 13 in slot 14 in order to open theoappillary-tube 9, is shownby arrow f of Fig. 3.

An interestmg character of the instrument lies, in the fact that theworking of 1ever-12 i which allows the ingress of the refrigerating agent'into chambers, 6 and 7 causes, simultaneously, the shutting off of a contact 16 on the ,7

that the turbine begins to give out the necess -sary air for the difl'usion of the ethyl chloride at the same a moment when said. ethyl chloride begins to 11 the diffusion chambers.

It has beennoted that the intimate mixture,

of the ethyl chloride with the air is only imperfectly gmadet when the'chambers are empty.

was b ii d that o t c n+ tra atotal difi'usionof the anaesthetic agent int e .air is obtained tube? withv v cotton wool, ends of,wool,fibers of asbestos, etc. still-better b t stuflingthe chimneys with 1' a strand, of ama ou,,1 8., jThe useofthis' stufiing, is an important pmo my invention.

The mixture is sent onto the part being treated by a small spout 19 screwed onto the end of tube 7. This spout is provided with slots 20, which prevent its clogging.

Lastly, the instrument may be advantageousl finished by a guard tube 21 which is app ied at its base over casing 3. This guard and casing 3 separate the cheek ofthe atient 0 V v I stream of air into said last mentioned tu e,

and the hand ofthe operator from t e cold tube 7. An aperture in this outward guard tube allows the operator tov appreciate the temperature which is obtained, accordin to the aspect and thickness of; the rime whic s formed on said tube 7.

After use,.-it-is necessar to be able to change the, gasifying cham ers 6 and 7 on whose'walls a'thicklayer of rime has been" formed which puts them'temporaril out of use, To allow the easy removingan replacing of these chambers, the whole of 6 and 7 a is made part of the guard tube 21, in any suitable manner, such as welds 24. In these com makesit easier to examine the region being;

ditions, by working on said tube, the gasi-l fyingchambers are easily unscrewed from the solidpiece 5. Y 1 I To isolate the'casing 3 from the inside of the instrument, a groove 25 may be formed in piece 5, or else'saidpiece may be provided with fins. v i

The guard tube is provided with asliding bracket 22' supporting a mirror 23, which anaesthetiz'ed. V

The apparatus according tomy invention might also be applied to general anaesthesia.

Y While I have disclosed what I deem to be" the; preferred embodiment of my device I-do not wish to be limited thereto as there might be-changes made in the construction, disposition' and form of the parts without departing from the spirit of my invention-as com- I I I e I msthesia through progressive refrigeration prehended within thescope of the appended claims. j 7

What I claim is: 1. An apparatus for producing dental anby a stream of air mixed with a refrigerating agent, which comprises in combination, a cas- 1ng,.a chamber in said casing, 'a ca illary tube'opening into'said chamber, a bott e containing the refrigerating agent connected to said capillary tube, a second tube opening into said chamber a turbine for feeding a stream of air into said last mentioned tube, a motor for drivin said turbine," means for simultaneously o turating said capilliarytube and.

stopping said motor, an elongated tubular chamber openin into said first mentioned chamber, means in said tubular chamber for thoroughly completing the intimate mixture ofthe air from the turbine with the refrigerating a ent, and a nozzleat the end of said amber'for directing the jet of the tubular mixture ontothe part to be anaesthetized,

2; An apparatus for producing dental anaesthesia through progressive refri eration by a stream of air mixed with a re rigerating agent, which com rises in combination, a.

casing, a chamber in said casing, a' ca illary tube opening into said chamber, a bott e con-- taining the refrigerating agent connected to said capillary tube, a second tube 0 ening into-said chamber, a" turbine for fee in a a motor for driving said turbine, means for simultaneously obturating said capillary tube and stopping said motor, an elongated tubularchamber communicating with said first mentioned chamber, a spongy material filling said tubular chamberfor completing the intimate mixture of the refrigerating a cut with air and anozzle at the end-0f; sai tubular chamber for'directing the jet of the mixture, onto the-part to be anaesthetized. I

; 3. An apparatus for roducingdentaI anaesthesia through progressive refrigeration said capillary tube, a second tube opening into said chamber, a-turbine for feeding a stream:

of air into said last mentioned tube, a-motor j for driving said turbine, means for simultar neously obturating said ca illary tube and stopping said. motor, an e ongated tubular chamber opening into said firsti men'tioned-r chamber, a strand 7 of amadou stufiedg inside the tubular chamber for completing theinti mate mixture of the refrigerating a entwith air, and a nozzleat the end of sai tubular.v chamberfor directing the jet ofithe mixture onto the part to be anaesthetized.

dental an-. 7

4. An apparatus for producing aesthesi'a through progressive refrigeration by a stream of air mixed with refrigerating agent, which comprises; in combination, a

casing, a chamber in said casing, a ca illary tube opening into said chamber, a bott e 'con-. taining the refrigerating agent connected to 1 said capillary tube, a second tube opening into said chamber, a turbine for feeding a stream of air into said last mentioned tube, a motor for driving said turbine, a stopper adapted, to be applied a inst the end of said capillary said stopper, y said leverfor .closing the feed circuit of said motor, when the stopper is not on the obturatingtube and) opening it when the stopper is applied against the obturating tube, an elongated tubulari;

tube, a lever or actuating) electric contact operated chamber opening into said first mentioned chamber, a strand of'amadou'stufled inside the tubular chamber for completing. the intimate mixture of the refrigerating-a ntwith 7 air, and a nozzle 'atthe end ofsai tubular chamber for directing the jet of the mixture onto the part being'anacsthetized. I

5. An apparatus for producing dental anaesthesia through progressive refrigleration by a stream of air mixed with re 'gerating agent, which comprises in combination, a casing, a chamber in said casing, a capillary tube opening into said chamber, a bottle containing the refrigerating agent connected to said capillary tube, a second tube opening into said chamber a turbine for feeding a stream of air into said last mentioned tube, a motor for driving said turbine, a stopper ada ted to be ap lied a ainst the end of said capi ary tube, a ever or actuatin said stopper, an electric contact 0 erated y said lever for closing the feed circuit of said motor when the stopper is not on the obturatingitube and opening it when the stopper is applied a ainst' the obturating tube, an elongated tu ular chamber opening into said first mentioned chamber, a strand of amadou stufi'ed inside the tubular chamber for completing the intimate mixture of the refrigeratin a cut with air, a nozzle at the end of said tu u ar chamber for directing the jet of the mixture onto the part to be anaesthetized, and a guard tube surrounding said tubular chamber for insulatin the hand of the operator from the cold tubu ar chamber. I

The foregoing specification of my Apparatus for producing dental anaesthesia signed by me this 13th day of Februar 1931.

CHARLES HENRI DANNEQ IN. 

